Python Basics-Lambda keyword

The Lambda keyword in Python can be understood as: It functions like a function pointer.

The official translation of Lambda is an anonymous function, which is relative to the normal function, for example:

Define a normal function that implements the increment 1 operation:

def plus1 (x):    return x+1

The above statement implements: 1. Defines a function called: PLUS12. This function has a parameter

The corresponding anonymous function statement writing:

Lambda x:x+1

Note that this is an expression, so he can't actually do anything ...

So if we want to invoke the function to implement the increment 1 operation, we use the normal function and the anonymous function for example, respectively, as follows:

Real-name function implementation:

def plus1 (x):    return x+1a = 0a = Plus1 (a) print a

anonymous function implementations:

Func = Lambda x:x+1a = 0a = Func (a) print a

Conclusion the use of anonymous functions, both as macro definitions in C and as function pointers in the C language。

It's even more fun to combine anonymous and real-name functions, such as:

def plus1 (x):    return x+1func = lambda X:plus1 (x) a = 0a = Func (a) print a

you see, this is not the use of function pointers?

The C language has a function pointer that becomes infinitely more flexible, and as well, Python can become equally flexible once lambda is used.

Python Basics-Lambda keyword